The Bank of England's flagship forward guidance policy linking interest rate decisions to unemployment is widely expected to be ditched - in its current form - this week, after just six months.
The guidance pledges that policy makers will not even consider a hike in rates from their current low of 0.5% until joblessness has fallen to 7%, but this now looks likely to be achieved much more quickly than previously thought.
Bank governor Mark Carney told business leaders in Davos last month that the policy needed to "evolve" with changing circumstances - signalling that this would begin at its quarterly inflation report on Wednesday.
The aim of guidance is to assure households and businesses that the cost of borrowing will remain low for some time, giving them the confidence needed to help the recovery take hold.
Economists expect that it will now be tweaked to take into account a broader range of factors, in a way designed to bolster that message.
When the policy was announced in its current form in August, the bank did not expect the unemployment threshold be achieved until 2016 but since then it has dropped much more quickly than forecast.
Latest figures showed the jobless rate had fallen to 7.1 per cent, within a whisker of the target.
It has brought forward expectations of an interest rate hike, with some predicting they will rise as early as this year.
But policy makers have stressed they are in no hurry to increase the cost of borrowing. Any pressure to do so will have been eased by the fact that inflation has now fallen to the bank's target of two per cent.
